An economy with a current account deficit must also havea.a capital account deficitb.a budget surplusc.capital account surplusd.a budget deficit

The correct answer is c. capital account surplus.

A current account deficit means that a country is importing more goods, services, and capital than it is exporting. This deficit must be financed somehow, and it is typically done so through a surplus in the capital account. A capital account surplus means that foreign investment into the country (inflows) is greater than domestic investment going abroad (outflows). This foreign investment helps to finance the current account deficit.

It's important to note that the terms of current account and capital account are part of the Balance of Payments (BoP) of a country, which always balances out. So, if a country has a current account deficit, it must have a capital account surplus (and vice versa) for the BoP to balance out.

The options a. capital account deficit and d. a budget deficit are incorrect because they would exacerbate, not offset, the current account deficit. Option b. a budget surplus is not necessarily related to a current account deficit.